Improvement in machines for tenoning blind-slats



JEFFERSON KINDLEBERGER AND VILLIAM AUGUSTUS ARNOLD, OF SAN.

FRANCISCO, CALIFORNIA, ASSIGNORS TO THE INVENTORS ASSOCIATION,

OF SAN FRANCISCO, CALIFORNIA.

IMPROVEMENT IN MACHINES FOR TENONING BLIND-SLAT'S.

Specification forming part of Letters Patent No. 95,810, dated October l2, 1869.

foV @ZZ whom, it may concern:

Be it known that we, JEFFERSON KINDLE- BERGER and WILLIAM AUGUSTUS ARNOLD, both of the city and county of San Francisco, State of California, have invented an Improved Tenoning-Machine for Blind-Shades; and we do herebydeclare the following description and accompanying drawings are sufcient to enable any person skilled in the art or science to which it most nearly appertains to make and use our said invention or improvements without further invention or experiment.

Our invention relates .to that class of machines used for tenoningthe ends of blindshades and it consists in an improvement by which both ends of the shade are formed at once from along strip of stuff fed in continuously from one end, while the nished shades are thrown 'off by another motion, not being handled at all.

The novelty of the machine consists in the use of cam or eccentric gear-wheels to drive the pinions through which the shade passes and by which it is turned while being cut, so that it will be properly brought into contact with the cutters and the tenons formed. `This is effected by turning the cam-gears once, thus rotating the :pinions and the shade twice, at which point. the motion stops. The strip from which the shades are formed is again pushed into the slot through the pinions and forces the finished shade out. lThis latter presses against a stop which releases the driving-pulley of the eccentric gears, when another shade will be formed, and at the same time the 1inished one is thrown off to one side by a partially-rotating table on which it rests as it leaves the place where it is formed. A single coiled spring returns the table to its. position by its torsional elasticity andreturns the stop to its place by its longitudinal elasticity. The stop against which the shade presses as it emerges from the machine operates the driving-pulley by a lever and a lug or catch, so that the gearing is automatically stopped after the formation of each shade till another is p putin.

To more fully illustrate our invention, "reference is made to the accompanying drawings, forming part of this specification, Figure l Fig. 3 is a top View or plan.

being a side elevation. Fig. 2 is an end view. Figs. 4, 5, and 6 are details of parts of the machine.

A is the framework or bed of the machine, and B the shaft upon which the` driving-puhl leys G G for the saws or cutters are fastened. The cutters F are mounted upon arbors with the Apulleys H H, and so made that the saws at the outside of each will cut off the shade and trim it to the proper length, while the inner saws form the shoulders, and Ithecutters betweenthe two form the rounded tenons of the shade, all this being effected while the shade revolves twice. Each of pinions E E has a slot, a, made as long as the greatest width the shades will ever have, which is so placed that it will stand horizontally when'the pinions stop after the formation of each shade.

Upon one side of each pinion is placed the device for holding the strip firmly in place till the shade is nished, this device consisting of jaws b b, moved by screws c c. Either spiral springs or elastic rubber rollers may form one or more sides of this opening, and we prefer to place the jaws on the outsides of the pinions E and near the cutter, so as to hold the strip steadily and .insure a good tenon. A rest or standard, L, is placed at the entering side of the pinions, over which the strip for the shades can slide, so as to enter the slot correctly and not be injured by the saws. At the opposite side of the machine is placed a narrow supporting table or guide, R. This guide is hinged at d, so that it can be turned when the lug on the wheel C strikes the lever c, which. depends from the end of the table R. The wheel C is fastened to a'shaft, O, and this shaft extends along between the sides of the bed, and carries the eccentric gears D, which drive the pinions E. The gears D are so shaped that, when their highest point is uppermost,

the pinions, being directly over them, will be so elevated that the slot a is exposed above the upper edge of the saws 5 but after the strip to be formed is inserted and the machine starts, the revolution of the gears brings it down upon the outer saws first and cuts the-shade to the proper length. A further motion and turning at the same time forms the shoulders at the inner end of the tenon, while the cutso that another length may be inserted, and at the same time force the finished shade out upon the table R. A lever, J, .is pivoted to the bed A, the upper end being moved from side to side by lugs d on the table R, while the lower end is bent so that a lug on the wheel C comes in contact with it, and thus stops its motion and that of the gears D just at the moment when the shade is finished. This can be done, as the pulley P is very small and the belt will slip easily. In order to start the niachine again, a lug, I, is fixed to the table R at such a point that as the finished shade is forced out it strikes this lug and moves the table longitudinally, and by the'lugs d and lever J releases the wheel C. At the same time the op posite lug on the wheel C strikes the lever e and turns the table so far as to discharge the shade into a conducting-trough just below. A coiled spring, M, returns the table to its position when the two levers are released by its elasticity in both directions.

In order to keep the wheels D and pinions E together in all their motions, a link, g, is made with friction-rollers i, which turn against the inner edge'of ilanges made for the purpose on the sides o'f the gears and pinions. rllhis insures a motion of the pinion following the irregularity of the gear, and to prevent the teeth meshing beyond the pitch-line a flange is made on both wheels and pinions, so that it is of less diameter, and as these ilanges are always in contact the teeth are kept in proper gear.

The saws and gears at one side of the machine are made adjustable, so that any length of shade may be formed; and in order to compensate for the wear of the saws and cutters, set-screws N are placed beneath the boxes in which their arbors turn. All wear of the links and standards may be taken up by set-screws and gibs or other known mechanical device.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is-

l. In combination with the cutters F F, the slotted .pinions E E, turned and at the same time traversed by the cam-gears D, Substantially as and for the purposes specied.

2. The combination of the flanges on the gears D, and pinions E, and the link g, with its friction-wheels i, for keeping the gears and pinions properly connected while revolving, substantially as described.

8. In combination with the lug I on the table R, the arrangement of the lever J, acting on the wheel C, for stopping the machine on the completion of each slat, substantially as described.`

4. rlhe combination of the hinged table R, the lever c, operated by the wheel G, and the springM, for discharging the finished slat and returning the table to its place, substantially as described. l

In witness whereof we have hereunto set our hands and seals.

JEFFERSON KINDLEBERGER. [L 5.]

WILLIAM AUGUSTUS ARNOLD. ['L. s] Vitnesses:

A. T. DEWEY', J. L. BooNn. 

